[#EVP_PKEY_set_bn_param]
= EVP_PKEY_set_bn_param
:mrdocs:

Set a named BIGNUM parameter on an EVP_PKEY.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_set_bn_param(
    xref:EVP_PKEY.adoc[EVP_PKEY]* pkey,
    char const* key_name,
    xref:BIGNUM.adoc[BIGNUM] const* bn);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pkey*
| Key to update.
| *key_name*
| Parameter name understood by the key type (OSSL_PKEY_PARAM_*).
| *bn*
| Integer value to assign (copied; caller retains ownership of `bn).`
|===


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